Valve-stem case.



I PATENTBD SEPT. 8, 19%.

a, SZNKLER: VALVE STEM CASE,

APPQICATLOEI nun 0012].. 1907.

Win/E555,

EDWARD B. SINKLER, on NEW YORK, N. Y-.

' VALVE-STEM CASE.

Specification of Letters Patent;

Patented Sept. s, 1908-.

Application filed October 1, 1907. Serial No. 395,350.

'To all whom it may concern:

Be it known that I; EDWARD B. SINKLER, of the city ofNew York, boroughof Brooklyn, county of Kings, State of New'York,'

have invented certain new and useful Im provements in Valve-Stem Cases,of which the following is a full, clear, and exact specification, suchas will enable others skilled in the art to which it appertains to makeand use the same. 7

My invention relates particularly to the valve stems and actuatingdevices of internal combustion engines such for example as the typicalgasolen'e engine employed in automobile work. In such engines it is awell known disadvantage that dust and grit attach themselves to thevalve stem and its actuating device with the result that the guides arecut and the parts become loose. From this condition lost motion arisesthus destroying the pro er timingof the valves. Further, as the gui esare cut the tight fit of the stem in the stem guide is destroyed andthus the efiect of the suction stroke of the piston-is impaired with theresult that the charges are not properly drawn into the engme.

The object of my invention is to overcome this disadvanta e and I attainthis result by means of a pecu 'arly constructed case which incloses thevalve stem and its actuating pin or rod and which is held in place bythe spring that serves also to seat the valve which spring is therebycaused to perform a double functlon. This case tightly incloses all ofthe moving parts and effectually excludes the entrance of dust and othergritty sub stances. It also serves asa means for holding a lubricant anddirects this lubricant from 40' the valve stem and its actuating deviceinto the crank case. of the engine Where the lubricant is againutilized, effecting a decided economy in this respect. v

The invention is applicable both to the admission and exhaust valves ofthe engine and is articularl'y useful on the admission valve.

he invention involves various other fea-.

tures of importance, and all will be fully set forth hereinafter andparticularly pointed out in the claims.

Reference is had to the accompanying drawings,which illustrate as anexample, one manner ofembodying my invention; in which drawings,

Figure 1 is a vertical section showing the inaention; Fig. 2 is areduced side elevation zontal section on the line 3'3 of Fig. 2.

of the case and 3 is an enlarged hori- (1, indicates the stem of thevalve which stem is of that construction usually incidentto the puppetor similar-valves of gasengines. The stem passes through the usual guide12 and into the combustion space of the engine as will be understoodfrom the prior art. 1

(3 indicates a fragment of the usual cam for actuating the valve whichengages a roller (1 held in the fork e of the stem operatin pin or rode. This is provided with the usua ad ing the cam shaft of the engine. Afragment" of this case is indicated at in the drawings. All of theseparts may be of the usual or any desired construction.

it indicates my miproved case which is j preferably constructed ofaluminium castings though it may of course be of other Ina-- terials. Itis made by preference in two sections as indicated in'Fig. 3 and thesesections are,removab1y held together by means of swing bolts h pivotedon and engaging lugs it formed on or fastened to the casting. By thesedevices, the castings may be quickly engaged and disengaged. For thepurpose of effecting a tight joint between these, sections, I provide agasket h of felt or vthe like which is let into the edges of one sectionto engage the adjacent edges of the other section. The case is alsoprovided with a plug h or other device facilitating the introduction ofoil as will be fully set forth hereinafter. This case incloses theexposed parts of the valve stem and its actuating rod andextends fromthe stem guide I) to the rod guide f.

i indicates the usual spring which is connected with the valve stem toseat the valve.

This spring is also inclosed by the case and to performing its usualfunctions in seating the valve, serves also to hold the case inposiliun. pressing it firmly against the gasket g and shoulder b.contracted to meet the upper end of the At its lower end the case isguide f and at this point 18 provided with the gasket of felt or othermaterial h which is let into the edge of the case and engages the guidef .to form a firm connection. It will thus appear that the easecompletely incloses al of the moving parts concerned with the valve stemand that it is sustained firmly by the spring t', the lower end of thecase inelosing the guide f but not necessarily sustained by-it. Thiscase, it will be seen, fully protects all of the parts from dust, dirtand other accumulations tending to cut and wear theparts and it,therefore, prevents them from wearing and becoming inaccurate in action.it also enables me to fully lubricate the parts by filling or partlyfilling the ease with oil. This oil is retained by the gasket la andwillv eventually find its way between the stem f and rod e into thecrank case of,

the engine, Where it will be further utilized by lubricating the camsand the cam shaft.

Having thus described my invention, What I claim as new and desire tosecure by Letters Patent of the United States is 1. The combination withan engine having a valve stem and an actuating device thereior, oi acase extending between relatlvely stationary parts of the engine andinclosing the exposed portions of the valve stem and actuating device,and a s ring engaging-the valve stem to seat the va ve and also engagingthe case to hold it in place. V

2. The combination with anengine having a valve stem and an actuatingdevice therefor, of a case extending between relatively stationary partsof the engine and inclosing the exposed portions of the valvestem andactuating device, said case being formed into two longitudinal sectionsand having means for removably holding them together, Whereby the casemay be. applied to and removed from position.

3. The combination in an internal combustion engine of a valve stem aguide for the stem a case inclosing the exposed portion of the stem andextending fromthe guide, and a spring engaging the valve stem to actuateit and also engaging the case to hold it in position. i

In testimony whereof'l have signed my name to this specification thepresence of two subscribing Witnesses.

, EDWARD B. SINKLER. Witnesses K HENRY W. HAsE, FREDERIO N. WHITLEY.

